[lttng-dev] [PATCH lttng-modules 3/5] fix: mm/vmscan: simplify trace_reclaim_flags and trace_shrink_flags (v5.2)

[Michael Jeanson]

See upstream commit:

  commit 60b62ff7cc4217ac3de76535fa4c1510a798dbcb
  Author: Yafang Shao <laoar.shao at gmail.com>
  Date:   Mon May 13 17:23:08 2019 -0700

    mm/vmscan: simplify trace_reclaim_flags and trace_shrink_flags

    trace_reclaim_flags and trace_shrink_flags are almost the same.
    We can simplify them to avoid redundant code.

Signed-off-by: Michael Jeanson <mjeanson at efficios.com>
---
 .../events/lttng-module/mm_vmscan.h           | 52 +++++++++++++++++--
 1 file changed, 49 insertions(+), 3 deletions(-)

diff --git a/instrumentation/events/lttng-module/mm_vmscan.h b/instrumentation/events/lttng-module/mm_vmscan.h
index db4a906..417472c 100644
--- a/instrumentation/events/lttng-module/mm_vmscan.h
+++ b/instrumentation/events/lttng-module/mm_vmscan.h
@@ -26,7 +26,16 @@ typedef int isolate_mode_t;
 
 #endif
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,2,0))
+
+#include <linux/mm_inline.h>
+
+#define trace_reclaim_flags(file) ( \
+	(file ? RECLAIM_WB_FILE : RECLAIM_WB_ANON) | \
+	(RECLAIM_WB_ASYNC) \
+	)
+
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0))
 
 #include <linux/mm_inline.h>
 
@@ -559,7 +568,20 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_
 )
 #endif
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,2,0))
+LTTNG_TRACEPOINT_EVENT(mm_vmscan_writepage,
+
+	TP_PROTO(struct page *page),
+
+	TP_ARGS(page),
+
+	TP_FIELDS(
+		ctf_integer_hex(struct page *, page, page)
+		ctf_integer(int, reclaim_flags, trace_reclaim_flags(
+				page_is_file_cache(page)))
+	)
+)
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0))
 LTTNG_TRACEPOINT_EVENT(mm_vmscan_writepage,
 
 	TP_PROTO(struct page *page),
@@ -586,7 +608,31 @@ LTTNG_TRACEPOINT_EVENT(mm_vmscan_writepage,
 )
 #endif
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,17,0))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,2,0))
+LTTNG_TRACEPOINT_EVENT(mm_vmscan_lru_shrink_inactive,
+
+	TP_PROTO(int nid,
+		unsigned long nr_scanned, unsigned long nr_reclaimed,
+		struct reclaim_stat *stat, int priority, int file),
+
+	TP_ARGS(nid, nr_scanned, nr_reclaimed, stat, priority, file),
+
+	TP_FIELDS(
+		ctf_integer(int, nid, nid)
+		ctf_integer(unsigned long, nr_scanned, nr_scanned)
+		ctf_integer(unsigned long, nr_reclaimed, nr_reclaimed)
+		ctf_integer(unsigned long, nr_dirty, stat->nr_dirty)
+		ctf_integer(unsigned long, nr_writeback, stat->nr_writeback)
+		ctf_integer(unsigned long, nr_congested, stat->nr_congested)
+		ctf_integer(unsigned long, nr_immediate, stat->nr_immediate)
+		ctf_integer(unsigned long, nr_activate, stat->nr_activate)
+		ctf_integer(unsigned long, nr_ref_keep, stat->nr_ref_keep)
+		ctf_integer(unsigned long, nr_unmap_fail, stat->nr_unmap_fail)
+		ctf_integer(int, priority, priority)
+		ctf_integer(int, reclaim_flags, trace_reclaim_flags(file))
+	)
+)
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,17,0))
 LTTNG_TRACEPOINT_EVENT(mm_vmscan_lru_shrink_inactive,
 
 	TP_PROTO(int nid,
-- 
2.17.1